Tighten all bolts, screws, and fasteners
Check and tighten the bed frame joints
Lubricate metal parts with silicone spray or wax
Place felt pads or rubber washers between rubbing parts
Tighten or replace loose slats
Add support under the mattress if needed
Check the headboard and footboard for movement
Use wood glue on loose wooden joints
Replace worn or damaged hardware
Add a center support beam or extra legs
Move the bed away from the wall if it is rubbing
Rotate or reposition the mattress
Place a rug or anti-slip mat under the bed
Replace the frame if it is warped or cracked